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<head>
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	<title>右键弹出菜单</title>
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</head>

<body>
	<div class="menu" id="menu">
		<ul>
			<li>添加应用</li>
			<li>获取课程</li>
			<li>添加笔记</li>
			<li>上传资料</li>
			<li>刷新</li>
			<li>更换背景</li>
			<li>注销</li>
		</ul>
	</div>
	<div class="wall" id="wall">
		<h4>桌面背景墙<span class="close"></span></h4>
		<ul>
			<li><img src="images/1.jpg" alt=""></li>
			<li><img src="images/2.jpg" alt=""></li>
			<li><img src="images/3.jpg" alt=""></li>
			<li><img src="images/4.jpg" alt=""></li>
			<li><img src="images/5.jpg" alt=""></li>
			<li><img src="images/6.jpg" alt=""></li>
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